Extension device



Dec. 17, 1929. P. w. JONES I EXTENSION DEVICE Filed Deo. 10.' 1928 www I @lllllmm INVENToR. -flag/:af Ifo/I4( fo/zes.

ATTORNEYS.

Patented Dec. 17, 1929 Ulti/*EID* sra'r'Esv rariiflail"A i PEIwIvMivv.` JONES; OEWARWIGK, YRHODE IsLANnHAssIc-:YNQR 'ro .aOsENHEIM oo;

INC., OE PROVIDENCE RHODE IsLAND, A CORPORATION OE RHODE rs1-SIND` contracted' positionf.

EXEENsION DEVICE Appiieatin filed December 10, 192e'. sei-iai No. 324,883;

This invention relates to an extension device fora Wrist strapand has for its object to provide a construction by which the eX- tension is obtained -by lbodily moving the parts away from each o ther in the direction of the longitudinal extent of thestrap rather.

' they'alre connected with one of the members so formed as to house the lazy-tongs ivhen in folded position.l v i Q Y .This invention, further consists in a con. struction for lockingthe members incontra'cted' position, and the provisin of ineens for' releas'ably'securing one end yof the strap to one Ofthe Inenibefsl and particularly pointed out inthe appended claims. y g Y I n'the accompanying drawings Figure l isa top' 'p'lan vie'v'v of the'extension" device in contracted position.A

Figure 2 is a top planr view AWith parts broken away ShWIlg'the" device in par'tlye'x".

tended position. t Y Figure v3 is a top plan. view with, parts, broken avvay and in-section Vshowt/jing"the, ar; rangement of the lazyltongsin folded position.; Y Y 'i v y. L

Figure 4- isa side elevation' of the device in' Figure 5 is a'perspective'vievv ofone part of the'liousing'member. Y

Figure 6 is a perspective view of another part'ofthehousingmemberly 'Figure 7 isa perspective viewo'f tlie'hous# ng'member of the extensiondevice assembled with theclamp in' released position and the' catch inunlockedsposition. v

p Figure Sfis a sectional view showing', the clamp housing lnember.l

in rposition to attach the strap totli'e" F ig'ur'e'9 is a sectional vievv'on line 9 9 of Figurev l0. i i

Figure 10 is a sectionalyievv on substantially line 10-10 of F i'gure9.

.In extension devicesof the type used for enlarging the encircling size of a Wrist band or the like, itis found desirable to provide a construction which is extremely thin. and neat on the arm of the wearer and one ,which maypermit of an enlarging movement vby a separation of its parts bodily Vin the direction of longitudinal extent of ythe strap rather than an unfolding of hingedly connected sections as is common in the art, and .in `order to' provide a construction to obtain these desirable results, l have formed. a housing withA 1 lazy tongs `mounted inthe housing which mayextendftherefrom to enlargethesize of the Wriststrap forremovalover the hand of the wearer and have provided a suitable look. for,pireventi'ng such extension lwhen the de?,

I viceisin vvvorling'or' operating position, and` With these and other; Objects injvievv, the

invention 'consists Q fpertaiii novel features'of l construction, as' Will vbe"'Iit'ii're fully described,

I. haveJ alsoprovidedin such construction a. means fory detachlably securing onerend of astraptothis device,.and the folloivingis adetailed descriptionj'of the present embodiment of thisY invention showingk thepreferred means by ivhich these advantageous results may be accomplishedi f f 1 Y With reference i0 nie,drawing5,110degniTv 80 nat-es the ChanneLshapefd body ofthe housing member having' av top Wall 1l and'si'de'walls l2 which receive between ithenr the bbttonf Wall 1B havingfside flangesll` to ,formfa housingz space 15v between vthe top and bottom Walls`. The .lianges'llli arfof a dimension to space tliebottom 4Walllffrom the topV Wall 11 a' distance less than the vvifdth Oftlles'ide" Walls 12 sothat the sidewalls vvill extend 90 beyond the bottoml v vall '13V av distance to l accommodate and concealV the free end of' the cla-mp` as Will be' prese]itly describedg Notches 1 6 are provided at the juncture of the bottomWall 13 andits flanges 14v tore- 95'" ceive iingersl7 'extending' from thefside vvvalls and into theirnotches' to hold the'bottomvvall inplace; l .y z

The bottom Wall 13 isa lengthlessthan the channel body 10 to leave the'to'p and sideV4 100 i 1,739,67e l walls protruding beyond the bottom at end 18. In this portion of the side walls, openings 19 are provided to pivotally receive the gripper or clamp 2O having a lever arm 2l notched as at- 22 to receive the iingers 17 and lie flush against the bottom wall 13 between the portions of the side walls 12 which extend therebeyond whereby the bottom surface presented by all parts of the device are in the same plane and the kclamp is concealed.

The cam acting strap engaging portion 23 of this pivotally mounted clamp is adapted to swing and force the strap against the top wall 11 to securely attach it to the housing member. In the illustration shown the strap consists of a plurality of block links 24 hingedly connected together as illustrated in Figure 8. The cam acting portion 23 is designed to extend into .one ofthe spaces between the links 24150 firmly hold the end of the strap to the extension device. An adjustment as to size .can be readily accomplished in this manner by cutting off the strap to the desired length before clamping it to the housing section.

In the housing space 15 one end of a series of jointed bars 27 and 28 pivoted together at their ends and points of crossing in a lazy tong arrangement is secured by suitable ,means 26 such as a rivet or the like, as illustrated in Figures2 and 3. At the other end of this lazy tongs, the member 29 of the eX- tension device is secured, which in turn is secured to'the endlink of an end of the strap.

i- )lVhen it is desired that the device be extended, the member 29 is moved away from the housing member and an extension of the lazy tongs takes place, as illustrated in Figure 2, las whereas when the device is moved to contracted position, the lazy tongs are folded into the position illustrated in Figure .3 withthe end member 29 positioned in the notches 30 formed inthe side walls 12 of the housing member.

This end member V29 is locked in contracted Jposition in lthe notches 30 by means of a yoke 31 having side arms 32 pivoted as at 38 to the side walls 1 2 of the housing member. vThe arms are joined together to support each other and move in unison as at 34 and are notched as at r35 with an undercut portion 3G so, as to preventaccidental raising of the yoke to release the member 29 it being understood that the longitudinal strain on the strap 'l pulls the member 29 into these undercut pormade `exceedingly thin to take up the minimum amount of space on the arm of the wearer and to afford a neat appearance when VOI'II.

The foregoing description is directed solely towards the construction illustrated, but

I desire it to be understood that I reserve the s privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being` defined and limited only by the terms of the appended vclaims. n I claim :--l

1. An extension device for a wrist strap or the like comprising a housing member attached to one end of the strap, eXtendible lazy tongs having one end secured in said housing and foldable therein, a member secured to the other end of said lazy tongs and attached to the other end of the strap and means for securing said members together and said lazy tongs in folded position in said housing.

2. An extension device for a wrist'strap or Vthe like comprising a housing member attached to one end of the strap, eXtendible lazy tongs having one end secured in said housing and foldable therein, a member secured to the other end of said lazy tongs and attached to the other end of the strap and a yoke pivoted to the said housing member and swingable over the other member to secure the members together and said lazy tongs in folded position. 4

3. An extension device for a wrist strap or the like comprising a channel shape member having a top wall and side Walls, a clamp pivoted between the side wall of the member to receive and clampbetween it and the top wall one end of a strap,a bottom wall spaced from the top wallto provide a housing space and positioned inwardly from the edge of the side wall a distance substantially the thickness of the free end of the clamp, lazy tongs secured in the housing space and eXtendible therefrom, avm'ember secured to the end of said lazy tongs and attached to the other end of the strap.

4L. An extension device for a wrist strap or the like comprising a channel shape member having a top Wall and side walls,means for securing one end of the strap thereto,'a bottom wall spaced from the top wall to provide a housing space, lazy tongs secured in the housing space and eXtendible therefrom, a member secured to the end of said lazy tongs and` attached to the other end of the strap, said side walls being notched on their ends to receive said member, and means to secure -said members in contracted position.

5. An extension device for" a wrist strap or the like comprising a channel shape member having a top wall and side walls, means for securing one end of the strap thereto, a bottom wall spaced from thetop wallto provide .a housing space, lazytongs secured in the housing space and extendible therefrom, a member secured to the end of Said lazy tongs and attached to the .other end of the strap, a yoke ous uniform relative movement of said elepivoted to said side walls having undercut ments and means for releasably locking said notches to swing over and receive said member members in adj acency.

to lock it against extension.

6. An extension device for a wrist strap or the like comprising a channel shape member having a top wall and side Walls, a clamp pivoted between the side Wall of the member to receive and clamp between it and the top wall one end of a strap, a bottom wall spaced from the top wall to provide a housing space and positioned inwardly from the edge of the side wall a distance substantially the thickn ness of the free end of the clamp, lazy tongs secured in the housing space and eXtendible therefrom, a member secured to the end of said lazy tongs and attached to the other end of the strap, said side walls being notched on their ends to receive said member, a yoke pivoted to said side walls having undercut notches to Swing over and receive said member to lock it against extension.

7. An extension device for a wrist strap or the like comprising two members located in substantially the same plane, each adapted to be connected to an end of a strap, extensible means connecting Said members together, said means comprising relatively movable parts arranged to direct a continuous relative movement of said members in substantially the plane in which they are located and means for releasably locking said members in adj acency.

8. An extension device for a Wrist strap or the like comprising two members located in substantially the same plane, each adapted to be connected to an end of a strap, inelastic eXtensible means connecting said members together, said means comprising` relatively movable parts arranged to direct a continuous relative movement of said members in substantially the plane in which they are located and means for releasably locking said members in adjacency.

9. An extension device for a Wrist strap or the like comprising two members located in substantially the same plane, each adapted to be connected to an end of a strap, extensible means connecting said members together, said means comprising relatively movable parts arrange-d to direct a continuous relative movement ot' said members in substantially the plane in which they are located and means for releasably locking said members in adj acency, one of said members housing said eX- tensible means when the members are in adj acenc 10;?7 In combination with a non-extendible wrist Watch strap, an extension device comprising two members each connected to an end of the strap, eXtensible means connecting said members including a series of similar elements arranged to carry one of said members toward or from the other by a continu- In testimony whereof I affix my signature.

' l PERCIVAL W. JONES. 

